HIGHLAND PARK, Ill., July 5 (Reuters) - The man charged with killing seven people at a Chicago-area July Fourth parade slipped past the safeguards of an Illinois "red flag" law designed to prevent people deemed to have violent tendencies from getting guns, officials revealed on Tuesday. [...] Sergeant Chris Covelli of the Lake County Sheriff's Office said earlier in the day that Crimo had legally purchased a total of five guns, including the suspected murder weapon, despite having come to law enforcement's attention twice for behavior suggesting he might harm himself or others. The first instance was an April 2019...